Qbain-sepakatoe



F. SWIFT.

Grain Separator.

Patent No. 25,922,

Patented Oct. 25, I859.

[aw-Mar fla UNITED STATES PATENT OFFICE.

F. SWIFT. 01 HUDQON, MICHIGAN.

GRAIN-SEPABATOB.

Specification of Letters Patent No. 25,922. dated October 25, 1859.

To all whom it may concern:

Be it known that I, F. SWIFT, of Hudson, in the county of Lenawcc and State of Michigan, have invented certain new and 5 useful Im rorclncuts in GraimSepm-ntors; and I do erchy declare that the ollowing is a full, clear, and exact description of the some, reference being bad to the annexed drawings, making a part of this specifics tion, in which- Figure 1, is a side sectional view of my invention taken in the line :11, m, Fig. 2. Fig. 2, is a section of ditto taken in the line 3 y,

gimilar letters of reference indicate corrcs onding parts in the two figures.

his invention relates 1st; to an im )rovemcnt in the screening operation so tootially as hereinafter described, whereby the screens, so far as l. am aware, are rcndere much more ellicient than hitherto without adding materially to the cost of construction or rendering the device more complex than usual.

To enable those skilled in the art to fully understand and construct my invention will proceed to describe it.

A, represents a case or box which may be of the form usually employed for grain separators. In this case or box a shoe B, is placed. This shoe also may be of the usual form, its front end being supported by elastic bars or springs a, a, secured to the inner sides of the case or box.

The shoe B, is supplied with the usual number of screens 1), c, the screens 1), the u per and lowermost. ones, are secured in he shoe B, as usual, but the screens a, the central ones are laced within a iarate shoe 40 C, which is ttcd within shoe B, and between proper guides so that it may have a longitudinal play or vibration therein. The

shoe B, has a lateral vibrating nmtiougi\-cu it. by means of a crank (I, on one end of the shaft c, of the blast fan, a commuting rod f,

and hell crank or right angled lever g, the

fulcrum of which is at. 0', said lever being connected with the shoe 5, by a link 1:.

Ono end of the lover g, is )rolongcd, cx-

tends within the case or box 1i. and has one end of a rod 5, attached to it. The opposite end of this rod 1', is connected to one and of a lover D, u'hirh is placed within tho case or box A, near its front. end and has its fulcrum at 7'. The end of lever D, opposite to that where the rod 2', is connected has one end of a rod is, attached to it, and the rod k, is connected to the back part of the shoe C.

From the above description it will be seen that simultaneousl with the lateral vibratin% movement of t e shoe B, a longitudinal v1 rating movement is given the shoe C, and the screens c, will consequently have two movements imparted to them a lateral and longitudinal one. By this arrangement of the screens they are rendered much more ciiicient than usual, the coarse stufi' being carried over the screens with much greater facility.

E represents the blast fan which may be of usual construction and incloscd within a cylindrical case or box F. One part of this case I is stationary but. the other part m, is movable, and its ends are titted and work in glrooves n, o, in the sides of the case or box, he grooves n. forming iparts of circles coinciding with the ends 0 the stationary part I, of the case F. The part m, of the case does not form so lar e a portion of a cylinder as the part 1., an consequently the part m, is allowed a certain degree of adjustment, and the eduction opengiig a, at the head of the shoe may be color or contracted so as to increase or diminisi the blast as may be desired. The part m, of the case F, may be adjusted by means of a button 72, which is connected to the part m, by an arm or bar q, the outer end of which passes through a slot 1', in a concentric end piece 8, of the box A, on which the button 2, slides. By this orrangement the strength of the blast gene!" ate by the rotation of the fan may be very nicely graduated, far more so than by legubiting the admission of air into the fan box, for in the latter case the current is not strong enou h in a hand lower so mrutor to be scnsi ily acted on in tihat wawimt. by having the cduction opening expaut cd or contracted the strength of the blast will be instantly ailertod and may be regulated as desired some grain and seeds requiring a greater blast. than others.

I do not claim the adjustable fan box for the ulrpose of regulating the draft for that has men used, but

Having thus descriluul my invention what I! human I claim as new end desire to seui'e by Letlaterel shake movement imperbed to it subters Patent 15, stantlally as and for the purpose set forth. The em ioyment or use of a sufiiplemental F SWIFT shoe 0, p aced within the shoe provided s with screens a, and having an independent Witnesses:

S. M. Wm'rz,

longitudinal shake movement given It, while the shoe B, with its screens 6, has the usual Lommzo Penman. 

